Pump jack



Deco 14`, v Y

` J. J. RANDOLPH PUMP JACK Filed Augulst 2o, 1926 2 sheets-Sheet 1 l` Av vc G I @l Dec. "14. 1926. f

- J. J. RANDOLPH PUMP JACK FiledA August 20. 192e 2 sheets-sheet 2 //////A//v/// i4 (/amegs Jeff/Panda//b V// /7 M l mvENfroR ATTORN EV s s E N w w Patented Dec. 141,V 19216.

JAMES anni: RANDOLPH, or TULSA, o KLnrroi/in,

vlustrated in the accompanying drawings and specifically ypointed out in the appended ure 2. n

In these views, l indicates a base upon i' the bellvcrank and a link 12 connects the.

Y lever 3 to oscillate .the said lever, which in PUMPJACK Application mea "AugustY c geo, i926.

Y VThis invention relates to "an improved-v pump jack, the general object of the invention being to give 'the puinpvrod4 a straight reciprocatory movement kby Veliminating the side motion -so as to prevent undue wearv on the packing gland .at the'mouth. of the cas l I l .Y y a, frame 2 is rocked onV its pivot and VThis invention also consists, in certain other features of 'construction and kin the f Vcombination and arrangement of the several i p V thecasing 5rv and thus the rod 4 will be moved -ina vertical plane without any side motion.

ing.

parts, to be hereinafter fully described, il-

claims.` v v y Y In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like 0r' corresponding parts vthroughout the severalviews,` and in which V:-'-

Figure lis an elevation showing the in-V f p .y

- make changes v1n Athe` construction and in the vention in use.V w v Figure2 is a Yplan view. Figure 3 is a section on line 3-3 of F igure 2.

Figure 4 which the verticalA supporting frame 2 of the rocking lever 3 is pivoted, this lever being connected atvits free end to the pump rod 4 which enters the pump casing athrough the' gland V6. Y Abell crank 7 is connected with the tubular shaft 8'which is rotatably mounted on the stationary shaft 9 which is carried bythe posts l0 on the base. The power rod l1 is connected withone arm of other end with thelever 3 so that/the rocking movement of the bell crank, imparted to it by the rod-1l, will be transmitted lto the turn reciprocates the rod 4. As` is well known, this movement will give aside pull tothe rod 4 so that an undue wear is placed onthe gland 6. In order-togovercome this,

n I provide means for moving'tlie lever 3V and its supporting frame 2 forwardlyto prevent l sidewise movement of the rod 4. This move` mentis limparted to thel frame 2 through means of the arms 1301i thel ends of the tubular shaft 8 and which are connected with.

iS a sectionl'on line 4-4 of Fig-i varranged frame pivoted at its .bell crank at the seran jive, 130,532;` f

the" forwardly extending rod 11,5 its rockingfmovement will 'be .coinmunieated to theframe 2 through ineansof thefarins 13 and links 14 so that ,Y thus-the brackets 414 on'ithe frame 2 by the linksl.' l

Thus as the bell crank. is' rocked vbythe a 55s the said y Y member 3 will be' moved bodily and thus its end which is pivoted to theyrod 4 will re main at vall times over'the vertical center of Y l The drawings show the"v frame 2 and lever 3 v as formed of frame-like structures but it will',`

combinationA andv 'arrangement of the several parts, provided that suchchanges fall withi' in the scope'of the appended claims.

, `What I claim is Y l. A jack of the class described comprising a lever adapted to be connected with the i pump rod, a pivoted support to .which the lever is pivotally connected, a bell crank connected with the lever for oscillating the same, means for connecting' the bellcrank witha source of power and'means for conneetingfthe bell .crankwith" the support forfv rocking the supportbythe'movement of the bell. crank.

2. Aljack comprisingl a base,a vertically the' base,an oscillatory lever pivoted at vone end to the upper end; ofthe frame, a pump rod connected with the other end of the lever, a bell crank pivotally 'sup-Y ported on the base, alink vconnecting one nesting the' other end of the'bell crank to a source ofp'ower, an arm connected wlth the )unctlonz of its two arms,y

lower end to p end ofthe bell crank to the lever, a rod con a link connected with the arm and a forw'ardly, extending parten the frame towhich 'the y Y- v rec link is connected.

In testimony' whereof Il aliiX my signature.

JAMns JETT RANDOLPH. 

